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dojo/selector/_loader.js
Maintainability
66.86
Lines of code
47
Difficulty
20.49
Estimated Errors
0.38
Function weight
By Complexity
By SLOC
define(["../has", "require"], function(has, require){ "use strict"; var testDiv = document.createElement("div"); has.add("dom-qsa2.1", !!testDiv.querySelectorAll); has.add("dom-qsa3", function(){ // test to see if we have a reasonable native selector engine available try{ testDiv.innerHTML = "<p class='TEST'></p>"; // test kind of from sizzle // Safari can't handle uppercase or unicode characters when // in quirks mode, IE8 can't handle pseudos like :empty return testDiv.querySelectorAll(".TEST:empty").length == 1; }catch(e){} }); var fullEngine; var acme = "./acme", lite = "./lite"; return { // summary: // This module handles loading the appropriate selector engine for the given browser load: function(id, parentRequire, loaded, config){ var req = require; // here we implement the default logic for choosing a selector engine id = id == "default" ? has("config-selectorEngine") || "css3" : id; id = id == "css2" || id == "lite" ? lite : id == "css2.1" ? has("dom-qsa2.1") ? lite : acme : id == "css3" ? has("dom-qsa3") ? lite : acme : id == "acme" ? acme : (req = parentRequire) && id; if(id.charAt(id.length-1) == '?'){ id = id.substring(0,id.length - 1); var optionalLoad = true; } // the query engine is optional, only load it if a native one is not available or existing one has not been loaded if(optionalLoad && (has("dom-compliant-qsa") || fullEngine)){ return loaded(fullEngine); } // load the referenced selector engine req([id], function(engine){ if(id != "./lite"){ fullEngine = engine; } loaded(engine); }); } }; });